对实验用小白鼠饲喂某种单一食物后,其排泄物中尿素、尿酸含量明

对实验用小白鼠饲喂某种单一食物后,其排泄物中尿素、尿酸含量明显减少,这种食物的主要成分肯定不是(    )

A.蛋白质                B.脂肪              C.淀粉              D.磷脂

答案

A


解析:

尿素、尿酸主要是蛋白质的代谢终产物,此物质明显减少,说明蛋白质等含氮有机物摄入量不足。

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